Photographic copying machine



Sept, 10, 1929. A. w. cAPs I PHOTOGRAPHIC COPYING IACHINE Filed June 26,1925 INVENTOR n mar Patented Sept. 10, 1929.

UNITED STATES PATENT OFFICE.

ARTHUR W. CAPS, OI KANSAS CITY, MISSOURI, ASSIGNOR TO P HOTOSTAT CORPORATION, OF PROVIDENCE, RHODE ISLAND, A CORPORATION OF RHODE ISLAND.

.PHOTOGRAPHIC COPYING MACHINE.

Application filed June 26, 1925. Serial No. 39,755.

This invention relates to a photographic copying machine, the primaryobject being to so construct a photographic copying machine that bothsides of a sensitized sheet may be presented to a projecting apparatusto enable the operator to photograph on both sides of the sheet.Specifically, the inven tion includes a copy-holder movable in ahorizontal plane to bring successive parts v of the copy holder in linewith the' projecting apparatus, the movements of the copy holder beingeffective in imparting movements to a sensitized-sheet holder so thatthe movements of the copy holder and the sensitized-sheet holder will besynchronized. The present invention contemplates a casing, aprojectingapparatus such as a camera, a reversible sensitizedsheetholder in the casing, a rectilineally reciprocatory copy holder outsidethe casing, and connections between the sheet holder and the copy holderso that when the copy holder is shifted to bring different parts in linewith the pro-- jecting apparatus the'sheet holder will be reversed,itbeing understood that the reciprocatory movements of thecopy holderare intermittent because there must be a pause between each half of areciprocation to provide-time for making the exposure. Thus a novelmeans is provided for printing on both sides of the sensitized sheet.

The specific construction of the illustrated embodiment of my inventionwill be clearly understood by reference to the following description inconnectionwith the accompanying drawing, in which I The figure is aperspective view of a copying machine constructed in accordance with myinvention.

Referring now to the drawing by numer-' als of reference, 1 designates acasing in which is an appropriate support 2 upon which is mounted theturntable 3 of a reversible sensitized-sheet holder 4. The specificconstruction o f'the sheet holder is immaterial, it being shown ascomprising two standar'ds 5 and 6 carrying a roll holder 7 in the .top,and amask 8 below the roll holder determines the efiective area of thesensitized-sheet 8 which is exposed to the proj ecting apparatus shownas a camera 9. The. specific construction of the turntable and holderconstitutes the subject matter of a separate application so it isthought that it 1s sufiicient in this application to point out that thesensitized-sheet holder rotates about a vertical axis in line with thecenter of the projecting apparatus.

The mask 8, consisting of two panels'bev tween which the paper is fed,is rigid with the turntable 3, the turntable being provid ed at itsperiphery with teeth 3 which mesh with the teeth of the pinion 10 on thestub shaft 11 in the bearing 12 in the front panel of the casing. Thestub shaft 11 extends below the bearing and it is connected to a shaftmember 13.by a universal joint 14, the shaft member 13 beingtelescopically secured in the sleeve 15 and held against rotativemovement with respect thereto by a lug 16 which works in theslot 17 ofthe sleeve. The lower end of. the sleeve is con nected to a stub shaft18 in'bearing 19 carried by the bracket 20 having a universal jointconnection 21. The lower end of the shaft ,18 carries a pinion 22 whichmeshes with a rack 23 on a rcctilineally reciprocatory copy holder.Thocopy holder includes a frame which is supported upon the table 25 bythe supports 26 and 27, the copy holder frame 24' being spaced from thetable 25 so that a backing plate or board may be received in the space28 to press the matter to be copied against the transparent panel 29 ofthe copy holder. The board for pressing the sheets to be copied againstthe transparent panel 29- may havesprings 30 on it similar to springsone. blue printing frame. The construction ofthe copy holder, however,is not important so I do not wish to be limited to any particular form'of the copy holder. The copy holder is held rigid with the table but itis adapted to swing on the a hinge supports 27 for the purpose ofintroducing and removing the sheets to be copied.

The rack, it will be observed, is rigid with. the table 25, the tablebeing movable rectilineally by the operator who may slidethe table alongthe channel guides 31 and 32. The table 25 has depending lugs 33, one ata rod or shaft, these shafts being indicated at 34 and 35. They carry ontheir ends rollers 36 which ride in the channel-shaped guides 31 and 32so that the table may easily be moved first in one directionand then inthe other.

It will be observed that there is but a single projecting apparatus orcamera and that the problem is to expose both sides of the sensitizedsheet 8' to the single projecting apparatus. One half of the copy holderwill be exposed at each operation, for example, if the parts are in theposition shown in the drawing and the left half of the copy'holder isbeing projected photographically against the sensitized sheet, the halfto the right will be the next part projected into the casing 1. When thecopy holder is shifted from right to left to bring the right half of thecopy holder in line with the prism 37 of the projecting apparatus 9 therack 23 will turn, the pinion 22 and through it cause the connectingshaft consisting of the members 13 and 15 to turn, imparting movement tothe pinion 10 so as to turn the turntable 3, 180 degrees about its axisto present the opposite side of the sensitized sheet to the projectingapparatus. Then when the exposure is made the right half of the copy inthe copy holder will be exposed against an unexposed side of thesensitized sheet. Consequently, both sides of the sensitized sheet maybe exposed, and by reason of the connection between the copy holder andthe sensitized-sheet holder it will be impossible to expose one side ofthe sheet more than one time. That is, there can be no double exposuredue to the fact that the sensitized-sheet holder has been reversed,because the act of shifting the copy holder will of necessity cause thesheet holder to be reversed. Of course when the copy holder moves overits guides the motion must always be communicated to the turntable onaccount of the positively geared connections. L

In actual ractice the sheet of sensitized material is ed through themask and cut off in lengths which ma drop to the bottom of the casing sothat t ey may be conveniently collected and developed. The specific formof the sheet severing mechanism is immaterial to the present invention.The table 25 may be raised and lowered upon the guides 38 and 39 toproperly focus the copy holder, so for that reason I have made the shaftconnections between the copy holder and the sensitized-sheet holderextensibl'e, this being accomplished by the arran ement consisting ofthe members 13 to 16, oth inclusive.

In so far as the generic embodiment of my invention is concerned the.device is susceptible to difierent constructions, so I donot Wish to belimited to the exact details of construction shown.

Of course it will be understood that the amplitude of movement of thecopy holder is fixed so that when the copy holder has moved far enoughin one direction to reverse the sensitized-sheet holder it will then bemoved back in the opposite direction.

What I claim and desire to secure by Letters-Patent is 1. In aphotographic copying machine, a casing, object-projecting meansassociated with the casing, a sensitized-sheet holder within the casinghaving means for exposing two sides of the sheet, a rectilineallyreciprocatory copy holder outside the casing associated with theprojecting apparatus, 1

and means connecting the copy holder and the sheet holder for causingreversing movements of the sheet holder in response to reciprocatorymovements of the copy holder.

2. In a photographic copying machine, a

casing, object-projecting means associated with the casing, asensitized-sheet-holder within the casing having means for exposing twosides of the sheet, an intermittently reciprocatory copy holder outsidethe casing associated with the projecting apparatus, and meansconnecting the copy holder and the sheet holder to cause reversingmovement of the sheet holder when the copy holder is moved in either oftwo directions. v 1 3. In a photographic copying machine, a casing,object-projecting means associated with the casing, a sensitized-sheetholder within the casing mounted for reversemovements so that twoopposite sides of the sensitized sheet may be exposed to the projectingapparatus, a copy holder outside the casing movable rectilinearly in aplane transverse to the axis of the projecting means, and drivingconnections between the copy holder and the sensitized-sheet holder tosynchronize their movements.

4. In a photographic copying machine, a casing, object-projecting meansassociated with the casing, a vertically disposed, reversiblesensitized-sheet holder within the casing, an intermittentlyreciprocatory copy holder outside the casing, and connections betweenthe copy holder and the sensitizedsheet holder whereby upon movement ofthe copy holder, a reversing movement will be imparted to the sheetholder.

5. In a photographic copying machine, a casing,. object-projecting meansassociated with the casing, a vertically disposed, sensitized-sheetholder in the casing rotatable about a fixed axis having an annular rowof gear teeth thereon, a reciprocatory copy holder outside the casinghaving a rack bar, a pinion engaging the rack bar, a inion engaging theteeth on .'the sheet hol er, and a shaft connected to the pinions.

6. In a photographic copying machine, a casing, object-projecting meansassociated. with the casing, a vertically disposed, sensitized-sheetholder in the casing rotatable about a fixed axis having an annularrow-of gear teeth thereon, a reciprocatory copy holder outside thecasing having a rack bar, avpinion engaging the rack bar, a pinionengaging the teeth on the sheet holder, a shaft and universal jointsbetween the shafts and thepinions.

7. In a photographic copying machine,- a casing, object-projectingmeansassociated with the casing, a vertically disposed, sensitized-sheetholder in the casing rotatable about a fixed axis having an annular rowof gear teeth thereon, a reciprocatory copy holder outsidethe casinghaving a rack bar, a pinion engaging the rack bar, a pinion engaging theteeth on the sheet holder, a shaft comprising telescopic mem' bers,connections between the ends of the shaft and the pinions, and means foryertically adjusting the copy holder.

8. In a photographic copying machine, a

sensitized-sheet holder comprising a vertically disposed sheetsupporting member, a

turntable at the bottom of the member having gear teeth on itsperiphery, a reciprocatory copy holder, a rack on the copy holder,pinions engaging the teeth on the turntable and the teeth of the rack,and a shaft connecting the pinions.

9. In a photographic copying machine, a sensitized-sheet supportingmember, a turntable supporting the member having gear teeth on itsperiphery, a pinion engaging the teeth, a copy holder spaced from theturntable comprising a frame, a table supporting the frame, a rack onsaid copy holder, a pinion meshing with said rack, guides forthe tablewhereby the table may move back and forth to rotate the pinion meshingwith therack, and a shaft connecting the pinion engaging the teeth onthe turntable and the pinion engaging the rack.

10. In a photographic copying machine,

the combination with a-camera casing, a

sensitized sheet holder arranged in the focal plane thereof, mechanismfor reversing the sheet holder, and image projecting means associatedwith the casing embodying a lens and prism, of a copyholder arrangedoutside of the casing in a plane angular to the focal plane, supportingmeans for the copy holder upon which it is movable to present successiveimage areasto the lens and driving means connecting the sheet holderreversing mechanism and the copyholder for synchronous movement.- I

In testimony whereof I afiix my signature.

ARTHUR w. CAPS.

